Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7f2dce52f4929fc5f6eaa377e2a630779425fb91c05d0608154ae2127dc9b88' 
  AND token = 'DE8TJUIWHB2GugusPNcl3BOP5pFElBKewJEDUx8wOJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}